Wireless boundary monitor system and method

Details Wireless boundary monitor system and method Wireless boundary monitor system and method

1996-01-11

1997-12-09

Swann, Glen

Communications: electrical

Condition responsive indicating system

Specific condition

181139, 367117, 367191, 367901, 367903, G08B 1316

Patent

active

056964897

ABSTRACT:
A wireless boundary monitor system used to monitor the integrity of a boundary surrounding an area uses at least two housings having at least one transmitting means for emitting ultrasonic pressure waves to a medium. Each of the housings has a plurality of receiving means for sensing the pressure waves in the medium. The transmitting means and the receiving means of each housing are aimable and communicably linked. At least one of the housings is equipped with a local alarm means for emitting a first alarm indication whereby, when the pressure waves propagating from a transmitting means to a receiving means are sufficiently blocked by an object a local alarm means or a remote alarm means or a combination thereof emit respective alarm indications. The system may be reset either manually or automatically. This wireless boundary monitor system has useful applications in both indoor and outdoor environments.

REFERENCES:
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patent: 3846779 (1974-11-01), Martner
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patent: 3986182 (1976-10-01), Hackett
patent: 4206449 (1980-06-01), Galvin et al.
patent: 4254483 (1981-03-01), Vivodic
patent: 4263665 (1981-04-01), Watts
patent: 4319349 (1982-03-01), Hackett
patent: 5552767 (1996-09-01), Toman

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